13128948 has 72 divisors (see below), whose sum is σ = 38683008. Its totient is φ = 3676608.

The previous prime is 13128923. The next prime is 13128949. The reversal of 13128948 is 84982131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12865 + ... + 13847.

It is an arithmetic number, because the mean of its divisors is an integer number (537264).

Almost surely, 2^13128948 is an apocalyptic number.

13128948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13128948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19341504).

13128948 is an abundant number, since it is smaller than the sum of its proper divisors (25554060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13128948 is a wasteful number, since it uses less digits than its factorization.

13128948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1048 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 13128948 is about 3623.3890213445. The cubic root of 13128948 is about 235.9083480173.

The spelling of 13128948 in words is "thirteen million, one hundred twenty-eight thousand, nine hundred forty-eight".